Esophagogastric Junction Contractile Integral (EGJ-CI) in Various Phenotypes of Gastroesophageal Reflux Disease (GERD)
DOI:
https://doi.org/10.22516/25007440.1066Keywords:
Gastroesophageal reflux disease, Esophagogastric junction, Lower esophageal sphincterAbstract
Introduction: Two parameters of high-resolution esophageal manometry are used to observe the function of the esophagogastric junction (EGJ): the anatomical morphology of the EGJ and contractile vigor, which is evaluated with the esophagogastric junction contractile integral (EGJ-CI). To date, how these parameters behave in different gastroesophageal reflux disease (GERD) phenotypes has not been evaluated.
Materials and methods: An analytical observational study evaluated patients with GERD confirmed by pH-impedance testing and endoscopy undergoing high-resolution esophageal manometry. The anatomical morphology of the EGJ and EGJ-CI was assessed and compared between reflux phenotypes: acid, non-acid, erosive, and non-erosive.
Results: 72 patients were included (63% women, mean age: 54.9 years), 81.9% with acid reflux and 25% with erosive esophagitis. In the latter, a decrease in EGJ-CI (median: 15.1 vs. 23, p = 0.04) and a more significant proportion of patients with type IIIa and IIIb EGJ (83.3% vs 37.1%, p < 0.01) were found. No significant differences existed in the manometric parameters of patients with and without acid and non-acid reflux.
Conclusion: In our population, EGJ-CI significantly decreased in patients with erosive GERD, suggesting that it could be used to predict this condition in patients with GERD. This finding is also related to a higher proportion of type III EGJ and lower pressure at end-inspiration of the lower esophageal sphincter in this reflux type.
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